SOLUCIONS 3.1 .pdf

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Original filename: SOLUCIONS 3.1.pdf
Title: Microsoft Word - Documento4
Author: SARA ALVAREZ CANTERO

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SOLUCIONS  3.1    
TIR  OBLIC    
(SOLUCIONS  3,  el  següent  document,  fa  referència  a  SOLUCIONS  
3.2,  que  és  un  tir  horitzontal)  
COMPOSICIÓ  DE  MOVIMENTS  
 

Eix  y  
Primer  extreim  la  velocitat  inicial  
V=2cos30  
V=1’73m/s  
 
Calculam  el  temps  
 
 

1
𝑥 = 𝑥! + 𝑣! 𝑡 − 𝑔𝑡 !  
2
 
           0=18,7-­‐1,73.t-­‐4,9t²  
t=  1,76s  
L’objecte  tocarà  terra  passats  1’76s      
 
Eix  x              
Necessitam  la  velocitat  a  l’eix  x  =  2sin30  =  1m/s  
Calculam  l’abast  topogràfic  
 
𝑥 = 𝑥! + 𝑣 · 𝑡  
           
x=1’76m  
L’objecte  ha  avançat  1’76m  en  horitzontal                                


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